Gas-furnace for chain-link welding or the like.



No. 888,112. PATENTEI) MAY 19, 1908.

L R. MLLER.

GAS FURNAGE FOR CHAIN LINK WELDING 0R THE LIKE. APPLICATION FILEDAUG.17, 1904.

2 SHEETS-SHBBT 1.

.Zigiz 1H: NvRRls PETERS co., wAsHmcToN. n. c.

110.888,112. PATENTLD MAY 19, 1908.

R. MLLER.

GAS PURNACE P011 CHAIN LINK WELDING 0N THB LIKE.

APPLICATION FILED AUG.17. 1904.

TH: Nonni: FEIsRs co., wnsmucrmv. n. c.

UNITED sTATEsPArENT onirica.

RUDOLF MLLER, OF GOTIIENBURG, SWEDEN, ASSIGNOR TO Tl'IE FIRM OFMASCHINEN- FABRIK ST. GEORGEN BEI ST. GALLEN (TOMMANDI'F-GESELLSUHAFTLUDWIG VON SSS- KIND, OF ST. GALLEN, SWITZERLAND.

GAS-FURNACE FOR CHAIN-LINK WELDING OR THE LIKE.

N0. 888,112. Specification f Letters Patent. Patented May 19, 1908.Application filed August 17, 1904. Serial No. 221,161.

To all whom tmc/y concern. i 'tor imparting to the air a suilicientacceler- Be it known that I, RUDOLF MLLER, a i ation when entering theheating-chamber.t subject ofthe German Emperor', and resident ,i Thefurnace has six heating chambers I) so of Styrs Tange, city oiGothenburg, in the ,l as to be able to heat six chain-links at the 5Kingdom of Sweden, engineer, have invented same time.

certain new and usefulImprovements in Gasi' e is a gas admission pipeand d an air-ad- Furnaces for Chain-LinkIVelding or the Like, l missionpipe, both pipes being carried by the 60 of which the following is anexact speci'f'ical 'trame a and having a square cross section. tion.l'lhe gas admission (pipe c consists of two ilo My invention relates toimprovements in branches, which enter the apparatus 'from gas-furnacesfor chain link welding or the opposite sides. Both branches are conlikeand also has for its purpose to operate nected by means oi the T-unione/ to a com- G5 modern chain-welding machines in a more l mon pipe c.The air admission pipe also economical manner. Several conditionsconsists ol'v two branches, which enter the must be fulfilled. duringthe operation of a apparatus on opposite sides. Both ends of weldingmachine. A su'tlicient number of the pi )e d pass through the cowl orcover c heated chain links must always be ready and of the viin-nace andlead to the outside through 70 further the links must all be equallyheated, the opening in this cover. Consequently so that the welding ofeach link can be sethe entering air is warmed by the outliowing curelye'li'ected by the same number ot hamgases oi" combustion. For obtaininga unimer blows. 'form distribution ol the gas and air entering It iswell known that the chain links to be both branches ol5 the pipes c andd these pipes 75 welded have been hitherto heated by susare preferablydivided by partitions at the pending the links into a common chamberpoint, where the branches meet below the with a more or less largeextension for procase a.

ducing the necessary temperature. The com- From the admission pipes cand d a numbustion chamber or the furnace proper has ber 0I branch pipesj' and y are connected at 80 been provided with one or twoopenings foropposite points. rlhe unions f/ and y are discharging the gas to bemixed with water provided with valves by means oi' which the into thefurnace. gas or air entering the several branch-pipes According to myinvention I subdivide the can be adjusted as desired. whole space intoparticular compartments my m are rods -for operating the valves. S5 thusforming' a plurality of small heating The branch pipes j' and dischargeinto chambers, each heating chamber serving to nozzles 7L and the latterinto small chambers heat one single chain link. Furthermore 7L', wherean intimate mixing takes place of each heating chamber is provided witha disthe air and gases entering through the branch tinct heatingarrangement to be described pipes and nozzles, and at the same time a 90afterwards. By this arrangement a very heating oi the mixture takesplace. Frein equal heating of each single chain link is obthe chambers7L the mixture l'lows into the 40 tained. chambers b where it burns. Thetwozstrcams In order to make my invention clear, I reentering eachchamber at opposite points i'er to the accompanying drawings, in which:meet each other in the middle ot the chamber 95 Figure 1 shows aconvenient construction and direct the generated heat upon a chain of animproved welding furnace in vertical link 7c which hangs upon a hook Thediisection, Fig. 2 is a partial side view, and Fig. ferent chambers bare narrowed at their Sis aplan view. upperl part showing about apear-shaped In the drawing' a 1s a metal case resting form, so that lossot heat 1s avoided and all 100 upon aframea. the heat generated 1semployed :lor heating b are heating chambers formed in the base thechain links. a by means of fire-bricks. 'Z Z are arms u )on which theopen links to a2 are metallic nozzles made integral with be heated areplaced, upon which a prelimi- Ithe casing and serving' for the suitableintronary heating takes place. 105

duction-of air into the heating-chambers, and L i are bars by means ofwhich the links lc are placed into the exit opening on the chambers b.

Having thus fully described the nature of this invention, what l desireto secure by Letters Patent of the United States is l. A chain linkwelding furnace, comprising a casing lined with refractory material, andprovided with two series of nozzles, oppositely arranged each to theother, chambers in said casing, each chamber being provided with a topopening, air-pipes discharging into said nozzles, in communication withsaid chambers, and gas-pipes passing with their free ends through saidnozzles, and communicating with the said chambers, and means forsuspending the chain-links to be welded in said top-openings.

2. A chain -linl welding furnace comprising a casing lined withrefractory material, and provided with two series of nozzles oppositelyarranged each to the other, chambers in said casing, each chamber beingprovided with a top opening, two series of mixing chambers incommunication with the said chambers and the nozzles, air-pipesdischarging into said nozzles, and gas-pipes passing with their freeends through said nozzles and discharging into said mixing chambers, andmeans for suspending the chain-links in said top-openings.

3. A chain link welding furnace comprising a casing lined withrefractory material, and provided with two series of nozzles loppositely arranged each to the other, chambers in said casing, eachchamber being provided with a top opening, two series of mixing chambersin communication with the said chambers and said nozzles, a commonairand a common gas-conduit, arranged below said casing, branch-pipesleading from the air-conduit to said nozzles, branch-pipes joined attheir one ends to the gas-conduit, and passing with their other endsthrough said nozzles to discharge into said mixing chamber, and meansfor suspending the chain-links in said top-openings.

4. A chain -link welding furnace comprising a casing, lined withrefractory material, and provided with two series of nozzles, oppositelyarranged each to the other, chambers in said casing, each chamber beingprovided with a top-opening, two series of mixing chambers incommunication with the said chambers and said nozzles, a commonairconduit and a common-gas-conduit, arranged below said casing,branch-pipes leading from the air-conduit to said nozzles, branch-pipesjoined at their one ends to the gas-conduit, and passing with theirother ends through said nozzles7 to discharge into said mixing-chambers,means for suspending the chain-links in said top-openings, and a coverinto which said top-openings discharge and through which the air-conduitis led in part for preheating the air.

ln testimony whereof l have signed my name to this specification in thepresence of two subscribing witnesses` RUDOLF MULLER.

l/Vitnesses. Y

F. WV. HoEcK, C. Winn.

